Multi-Antenna Wireless System for High-Speed Train Communication
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Solution Overview
Problem
Current 4G cellular communication systems experience throughput degradation and link quality issues when applied to high-speed vehicles, such as trains exceeding 350 km/h, due to high mobility, leading to insufficient data capacity and interference with other users.
Innovation Solution
A multi-antenna wireless communication system that sets a same pilot pattern for each transmitting antenna, allocates different pilot sequences, and transmits these sequences to form independent communication links, allowing data layers to be transmitted through multiple antennas to improve data capacity and minimize pilot overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a 4G cellular communication system is applied to high-speed vehicles traveling over 350 km/h, then the system can provide wireless communication coverage, but throughput degradation and link quality deterioration occur due to high mobility
Solution Approach 1:
The system segments the communication function by introducing multiple transmitting antennas at the base station, each forming independent communication links with the high-speed vehicle. This segmentation allows the system to maintain multiple simultaneous connections, compensating for the degradation caused by high mobility and ensuring sustained throughput even when individual links fluctuate.
2Quantity of substance
If the number of transmitting antennas is increased to improve data capacity, then more independent communication links can be formed, but pilot overhead increases
Solution Approach 1:
The system applies local quality by assigning different pilot sequences to different transmitting antennas while maintaining the same pilot pattern. This allows each antenna to be uniquely identified and its channel estimated separately, enabling the system to support multiple independent data streams (increasing data capacity) without requiring separate pilot patterns for each antenna, thus controlling pilot overhead.
3Reliability
If wire communication through tracks is used for high-speed train communication, then stable communication can be achieved, but capacity is limited and physical restrictions prevent more links
Solution Approach 1:
The system transitions from the one-dimensional constraint of track-based communication (limited to 2 simultaneous links) to a multi-dimensional wireless MIMO architecture. By utilizing multiple transmitting antennas spatially distributed at the base station, the system creates multiple independent wireless paths to the vehicle, effectively adding spatial dimensions to the communication channel and enabling more simultaneous links without physical track constraints.
Data Source
AI summary
The present invention discloses a method for transmitting a same pilot sequence from a transmitting end to a receiving end in a multi-antenna wireless communication system. In particular, the method comprises the steps of: setting an identical pilot pattern in a plurality of transmitting antennas, allocating respectively different pilot sequences to the set pilot patterns, and transmitting the allocated pilot sequences to the receiving end, wherein at least one of the transmitting antennas forms a valid communication link with one of the receiving antennas. Here, when there is a plurality of valid communication links, the plurality of communication links are mutually independent.